Gearing



, P. SAMAIN.

HEARING.

APPLICATION FILED JAN. 24. 1921.

Patented Sept. 13, 1921..

w'lmvwml I 73 ]NVENTOR:

PJ'EB RE SAMAJN TTOBNEJ.

is slidinglyen'gaged "a lenticular. shapei'int'erpo'sed between the said5 ing shaft "rotates, the toothed pinion keyed 1 1t thesl iding member.I

theel'ement'fixedtothe sliding member also PIERRE SAMAIN, or oUsY.FRANCE.

GEARING.

, Applicationfiled January 24, 1921. Serial No. 439,651.

To all 'w 7mm it may concern Be it known "that I, PIERRE SAMAIN, acitizen 'of the 7 French Republiq'and' resident "of Cusy, Haute'S'avoie, France, have invented certain new and. useful Improvements inGearing, (for which I have filed application in Belgium, January 20,1920), of which thefollowing is a specification.

The present invention has'for its object to provide a novel change,speed gear for progressive speed and reversing of motion, in whichthe'usual toothed gear is dispensed with, sothat no losses of powerdueto the friction between said toothed wheels, occur, the motion of themotor or driving shaft be-' ing transmitted to the driven shaft, by, ex-

erting apres'sure causinga rollingm'otion Without slippingfbetween theelements in contact, as itwill be exposed hereinafter.

Then'ovel change speed gear may be applied to automobiles andto anyengines'or machines,.machine tools of any type, 'thus dispensing with'the Various transmission parts such as belts, pulleys and the likeconnection devices.

-' The. novel device essentially consists in of't'wo disks disposedopthe combination -pos'ite main parallel relation with respect to eachother" and operated" by a pinion keyed on a hollow "driving shaft" intowhich the sliding inember, respectively the driven or transmission shaftof the change speed this, latter having fixed upon it-an element suchdisksfwhich latter be firmly pressed in opposite "directions againstsaid element by means of a resilient pressure device. I

' It be understood that, when the driv on. it and -,engaging both.*di'sks, rotates the latter in direetions opposite to each other,whereby the interposed element, firmly 'r'essed'by said disks, rotates;carrying with Now, when by means ofany known-shifting device the slidingmember radially disposedwith respect/to the *disks is shifted in thedirection of' a diameter of the disks,

slidesradiallyinsaid direction andto every position of the elementcorrespondsa determinated speed of rotation of same and consequently ofthe sliding member/of the change speed gear. When the said element solid:shaft forming Specification of Letters l a tent. i Patented Sephli},1921.

V is shifted at thecente'r line of the disks, the

two diametrically opposite points of con-.

ment the sliding member rotate with a maximum of velocity, one of suchpositions corresponding to the forward motion, the other'to therearward'mo'tion of the device.

In order that the nature of thei'nvention may be readily understood, thenovel device is illustrated byjway of example in the'accompanyi ngdiagrammatic drawing, in which: i

Figure 1 shows a constructive form in i section according to line 'AB ofFig. 2;

Fig-'2 is a section on 1ineC-D of Fig; 1.

Fig..i3'- shows the inion secured onto the end of tlie'driving s aft.

Fig. 4 is a different constructive form of the changespeed gear. i

Referring to said drawing, "2 and 3 are "two disks disposedopposite andin parallel relation to" each other and provided at the periphery withholes for being engaged by pins of a 'commonfangle wheel 1' (Fig. 3)

fixed at the end of'the hollow driving shaft 1-1.. Into the latteris'slidably engaged'a solid shaft 1'2 forming the sliding member ordriven shaft ;of the change speed gear and upon shaft 12 is fixed in anyconvenient manner-a ballet made of tempered steel. Shaft 12 isguided' atone hand within shaft 1,1,Yon the other hand by a cross beam 17through-which it extends, said cross beam being secured on theframe. beoperated by-mea-ns of a lever 10, whereby itlllOVS in a radial directionwith respect to bothdisks 2 and 3. To every position of the ball 4slidable between both "disks corresponds a determinated speed of rota.-tionof same and consequently of the 'sliding me'mber'12.

When the latter is'pu'shed toward the left y Shaft 12 may meansof-the'lever 10, ball 4 and sliding member 12 rotate in the forwarddirection T v w of the machine or the like, the maximum speed beingobtained when the ball is in its outermost position toward the left.

I When the shaft 12 is pushed back, toward the right,-beyond the centersof the disks,

the machine or the like, the machine rotates in the rearward direction.

The whole device is inclosed in a casing formed of two undulated caps 13made of pressed tempered steel and forming strong springs balancing eachother.

By'means of screws 14 the disks 2 and 3 may be firmly pressed againstthe ball 4 in order to secure a perfect rolling of the latter Withoutany slipping, during the rotary motion. Ballsv 15 inserted between thescrews 14 and the disks 2 and 3 form pivots for the, latter. I

. Owing to the undulations of the caps 13 they act as strong springsupon the disks 2 and 3 through the intermediate balls 15.

Rollers 5 and 6freely rotatable onspindles secured to the lateralwall'of the casing, support a fraction of the. pressure exerted on disks2 and 3 by the resilient caps 13 of the casing during the rearwardmotion of the device, while rollers 7 and 8, similarlymounted onspindles fixed to the lateral wall of the casing, support a fraction ofthe pres sure on the disks duringthe forward motion of the device. I rOn the sliding member 12 is keyed a hol low shaft 18 controlling thedifferential of the .wheels or the like.

Fig. 4 illustrates a constructive. form of I the change'speed gearshowing that the rolling element 4: may be of any convenient shape anddiameter, provided that its circular periphery contacts only at onepoint with each of the disks 2 '3 The rolling element. in the exampleshown is of lenticular'shape; It may be observed that the speed alsovarieswith the diameter of the rolling element 4L the smaller thediameter of the element, the higher is the speed.

The variations of speed may also be obtained by varying the diameterofthe pinion 1 or thatof the disks 2 and 3 1 Between roller 4 and disks23 may be inserted interchangeableidisks 16 made of any hard metal. H r

- It is understood that the present invention is not limited totheconstructive forms shown and described inthe present specification, vi

Having now fully described my saidinvention, what I claim and desire tosecure by LettersPatentJs; V

1:7 Gearing ofthe type described, comprising a supporting element,.apair of undulated resilient caps mounted on said sup porting element, apair of oppositively' dis posed disks having a'cen'tral universalhearing against said caps, a hollow drive shaft extending through;thesupporting element and between the disks and provided with an annularmember engaging the faces ofthe disks for imparting rotation thereto,asolid shaft extending between the'disks having the disks duringthemotion of the device;

bearing in the end portion of the hollow drive shaft and the supportingelement, an engaging member carried by the solid shaft and engaged bythe disks, means for moving the solid shaft in an axial direction, and

idler rollers adapted to be engaged by the disks carried by thesupporting element. 2. Gearing ofthe type described, comprising acircular casing, two symmetrically disposed tempered steel disks looselyinserted engaged into said hollow shaft, a guide outside the casing forguiding said solid shaft forming the sliding member of. the chan e speedgear, a tempered steel memberrigid y secured to said solid shaft betweenboth said disks, undulated resilient caps forming the top and bottomofsaid casing, set screws engaging threaded holes provided at the centerof each of the said undulated plates, balls inserted in alveolaeprovided in the. center of the outer face of said disks and pressed bythe said screws, wherebya' strong pressure is exerted in oppositedirections bythe undulated spring plates upon the disks, these oppositepressures being transmitted bythe disks upon the rolling member in orderto prevent any slipping of 1 the latter onthe disks and pairs of rollersloosely mounted on spindles fixed on the lateral wall of the casing inorder to support a fraction of the pressure exerted by theresilient'plates upon i 3. Gearing of'the type described, compris} ing acasing, two symmetrically. disposed tempered steel disks looselyinserted-within said casing, a hollow driving shaft radially extendinginto said casing between. both said disks, a1 toothed pinion keyed atthe end of said hollow shaft projecting into thecasing and engaging saiddisks forimparting to thesame rotary motions in opposite ,direc- 'tions,a solid shaft radially extending into said casing and slidably engagedinto said hollow shaft, a guiding member for guiding the said solidshaft,-an element securedto said solid shaft and operatingbetween anddriven by said disks, undulated resilient caps forming the top andbottom ofsaid casing, a threaded centralhollow' on eachofisaid caps,'set screws engaged in said threaded central holes of the caps, analveola at the 7 center, of the outer surface of each of said disks, aball inserted in each of said alveolae and receiving the pressure of thecorrespond ing set screw for the purpose described, .7

4;. Gearing of the type described, compris ing a supporting element, apair of undulated resilient caps oppositely disposed supporting element,a member carried there- 10 thereon, a pair of disks oppositely disposedby frictionally engaging the disks, and between the caps, a universalbearing for means for sliding the solid shaft.

each disk adjustably mounted in the caps, a In testimony whereof I havehereunto set hollow drive shaft rotatable in the supportmy hand inpresence of two witnesses.

ing element and extending between the PIERRE SAMAIN. disks, a drivingelement carried by the Witnesses: shafts for driving the disks, a solidshaft JULIAN KEMBLE SMEDBERG,

slidable in the hollow drive shaft and the C. CARRIGAN.

